Sadagiko kawahishi



S. KAWANISHI.

DISINFECTING APPARATUS.

APPLICATION HLED MAY 8. 191B.

'1 09,859. Patented July 15, 1919.

- 7M WW SADAGIRO KAWANISHI, OF TOKYO, JAPAN.

DISINFECTING ATPARATUS.

Specification of Letters Patent.

Patented July 15, 19112.

Application filed. May 8, 1918. Serial No. 233,269.

T all whom it may concern:

Be it known that I, SADAGIRO KAWANISHI, a subject of the Emperor ofJapan, and a resident of No. 117 Shimo-Shibuya, Shibuya- Machi,Toyotama-Gun, Tokyo, Empire of Japan, have invented new and usefulImprovements in Disinfecting Apparatus, of which the following is aspecification.

This invention relates to improvements in disinfecting apparatus and hasfor its object the destruction of the micro-organisms in books,paper'currency, and other like articles.

In order that this invention may be clearly understood and more easilycarried into practice, reference may be had to the .accompanying sheetof drawing upon which is shown in somewhatconventional form an apparatusaccording to the invention partly in elevation and partly invertical-section.

Referring to the drawing, the numeral 1 designates a tank inwhichfumigating gas is contained, 2 the casingto receive the arti cle to bedisinfected, and 3 the pump interposed between the tank and casing, itbeing understood however that the construction of the tank and casingmay be varied as desired.

G and G, respectively, represent vacuum and pressure gages, mounted uponthe casingand tank, respectively. Preferably" the casing 2 is internallyprovided with a plurality of superimposed shelves 8, which are hereshown as rotatably mounted upon the central shaft A." The casing is alsofitted at front with a sliding door, not shown.

The pump 3 is connected at suitable points with the casing 2 by an airextracting pipe t and a gas inlet pipe 5. The tank 1 is connected withthe pump by a gas supply pipe 6 and a gas return pipe 7. 8 and 9,respectively, are discharge and feed pipes, the latter leading toanother tank, not shown, from which fumigating gas may be supplied tothe tank 1, a suitable cock to govern the flow of the air and gas beingmounted upon each pipe, as at 10. At 11 and 12 are represented suctionand discharge valves, respectively.

It will be understood that by operating the pump 3 after closing allcocks except the one mounted upon the air extracting pipe 4 and the gasreturn pipe 9 the air is exhausted to approximately a vacuum conditionfrom the casing 2. By operating the pumps} after closing all cocksexcept the one mounted upon the gas inlet pipe '5 and gas supply pipe 6the fumigating gas is forced from the tank 1 into the casing 2 and intothe. molecular cavities of the articles, books or the like in the casing2, thereby killing all infectious micro-organisms and without in any wayinjuring such articles. By operatbe returned from the casing 2 into thetank 1.

In some instances, according to the nature of the micro-organisms; itmay be desirable to incubate the bacteria before they are subjected tothe sterilizing operation. To this end the casing 2 may take the form ofa jacketed cylinder having peripherally inclosed space 13 adapted toreceive therein steam or other suitable heating media at an appropriatetemperature.

When it is desired to free the article treated from the smell impartedto it by the fumigating gas a suitabledeodorizing agent or flavor may beadmitted into the casing. This can be done by operating the pump afterclosing all the valves except the one mounted upon the gas feed pipe 9and gas inlet pipe 5.

Having thus described my invention what I'claim is 1. In apparatus ofthe class described, the combination of a casing, a service tank tocontain a gas, a pump, and connections between the said tank and thepump, said connections having cut ofi' valves and also havingcontrolling valves whereby the pump may be used to exhaust air from thecasing and to force gas from the tank into the casing.

2. n apparatus of the class described, the combination of a casing, aservice tank to contain a gas, a pump, and connections between the saidtank and the pump, said connectlons having cut ofi valves and alsohaving controlling valves whereby the pump may be used to exhaust airfrom the casing, I

to compress gas in the tank, and also to force gas from the tank andcompress the samein the casing.

I to compress gas .in the tank, also to 3. In apparatus of the classdescribed, the combination of a casing, a service tank to contain a gas,a pump, and connections between the said tank and the pump, saidconnections having cut ofl' valves and also having controlling valveswhereby the pump may be used to exhaust air from the casing,

from the tank into the casing and compress force gas in presence of twoWitnesses. SADAGIRO KAWANISHI.

Witnesses:

HARVEY F. OLTMANs, H. YAsUMUN.

